Feeding schedule for 7 month

My son is 7 months old. He takes 2 meals ( porridge in the morning & puree in the evening & 1 rice biscuit each meal ) with 4x breastmilk 150 mls each time per day. I was wondering is this enough ? Im quite anxious because im used to feeding him alot of breastmilk a day and cutting down on his BM makes me feel guilty .