Formula feeding help

Hi,

I am a new mum / 6 weeks old baby.

Im exclusively on formula. I am a little confused about the amount of formula for my boy.

Im worried I am giving him too less because he screams hunger after 1hour/1hour 30 mins.

I give him 90ml every 3 hours. (3 oz)

Is it safe to increase to 120ml at one feed?

Im just worried if it’s too much for him. And everyone seems to be treating me like I am underfeeding the baby 😭😭 Im worried on my side if it’s too much. It’s such a hard road.

Please advise me.

Baby’s weight: 4.2kgs.