How much of formula 5 months baby?

Larissa

My baby boy was drinking all 180 per feeding, sometimes even 210, but about a month ago he just stopped drinking all and drinks about 700ml per day most of the days, sometimes 800,900ml. I don’t know why and is that enough? I keep checking his weight and he’s increasing ok 🤷🏻‍♀️ How much of fórmula your baby drinks a day ladies?