how much do you feed your 3 month old?

Wondering how much you feed your 3 month old and how many times a day? I know every baby is different, but i'm not sure if im feeding my LO enough. right now i give her 5.5-6 oz as her first bottlr of the day, followed by 4 or 5 5oz bottles and 6oz before bed. she seems to want to eat ever 2-3 hours. is that enough? too much? i have no freaking clue. edit: she is EFF, if that makes a difference.