Formula feeding / too much??

My baby is 11 days old. She is cluster feeding 2-3 times a day and I’m worried I’m over feeding her. She lost 5oz after birth, struggled with breastfeeding and is now formula fed. We were told she’d eat extra for one/two days to make up for what she lost out on when BF, however it’s been 5 days. She eats 3oz at a time, sometimes will go through two bottles in two hours.

Q is: how much is too much?!?! How am I supposed to deter her from eating? It’s clear she’s hungry but I feel like 9oz in 5 hours is a lot for an 11 day old 8lb baby?