Since you seem to be new around these forums and think you have a chance of getting into medical school with a 2.75 GPA and a 28 MCAT, let me tell one thing before I offer advice: put the blunt down.
First off, welcome to SDN. This forum offers great advice and following these forums for all the good information that it provides is the first step on your journey to medicine. Now for my advice:
You have two options with regards to applying: MD or DO. That being said, you need GPA repair in addition to a better MCAT score. So how do you go about a GPA repair?
In my opinion, the best way is to do a undergraduate post-bacc for 2-3 years while maintaining as close to a 4.0 GPA as possible. This is what my intention is after I graduate this year. Often times, these programs are classified as "non-degree seeking" or as "second bachelors" programs. Apply for the second bachelors if schools in your area offer it. They are cheaper (if in-state), provide you with all the resources that the other students receive, and you also get priority registration.
During this post-bacc, you should maximize your BCPM (biology, chemistry, physics, and math) courses and perform well. Another option is to retake all the classes you did poorly, get A's, and use the AACOMAS grade replacement policy for DO schools. This retake route will probably save you a year or more since you're simply retaking classes to skyrocket your GPA as opposed to taking multiple semesters of newer classes that you never took before.
Now, the most important thing to note is that completing a master's will not help you at all. Grades are inflated in graduate school, and even if you perform well, your undergrad GPA will not pass the screens. So get those past the 3.0 "cut-off" before you apply for a special program called an SMP. Apply to those programs that have linkage agreements with medical schools. If you can't get into one of those, doing a master's in medical sciences or other pre-med master's programs (designed for students with low stats who are trying to make it big) is a good idea as well, but there comes a great risk with those programs without linkage. For more information on those, check out the post-bacc thread on this forum.
Lastly, you need to obtain a better MCAT score and so I recommend the MCAT thread which has a tremendous amount of information on how people scored well, what they did, etc.
I think you can do it. All you need to do is prove it. I'm in the same boat as you and intend to embark on an arduous journey for the next 3 years. I wish you luck and if there's any other information I can provide, please let me know.