How many ounces per bottle does your lo drink? How often do they eat and how old is your lo?

M is 11 weeks old and we're feeding her bottles of breastmilk during the day while I breastfeed at night. We give her 4oz now and she is hungry every 2-2.5 hours. I just talked to the advice nurse at our pediatrician's office and she suggested we move to 5oz every 3-4 hours. I'm guessing more ounces at one time = less feedings a day?