Well, most SMP's (at least at allopathic schools) tend to evaluate grades like AMCAS, not AACOMAS. IE, any retake courses get averaged, NOT replaced.
It will be tough to get into any SMP with a 2.75. While 3.0 may be the minimum, realistically 3.2-3.3 is more what is expected, and this is if you have 32+ MCAT to go with it.