If the curve is at 2.7, that means that half the class will be above and half below. Its a harsh curve. I preface (suffix?) this by pointing out that I am not a math major and do not understand if its exactly an average, some sort of median, or a mean (which I doubt).
If you want to know your schools curve go to the "academics" section of their website, and they'll give the "suggested" grading structure, which may or may not be followed by any given professor.