My newborn is drinking formula milk every 1-1.5hr. Should I be worried?

Hi mummies. My 3 week old baby keeps wanting milk every 1-1.5hr. Initially he drinks 60ml every 2-3hrs but we realised that he keeps wanting more milk every 1-1.5hr. So we decided to up his intake to 75ml. Even with the increase in formula milk, he still wants milk every 1.5hr. He still poops normally, no diarrhoea or vomiting. I am doing mix feeding, breast milk and formula. FYI, I’m using Dupro. Should I be worried? #firsttimemom #worried