4 month old

My daughter is 4 months old in a couple weeks and is wanting to eat 5 oz every 3 hours on the dot. I just feel like that’s so much for her to be eating every 3 hours. How much are your 4 month old’s eating? Her pediatrician recommends waiting 4 hours but obviously I cannot do that when she’s screaming hungry at the 3 hour mark and I’ve tried everything else to soothe her thinking something else is wrong and I know she wants a bottle, I can’t just starve her.