I would have thought it would be easier to look up how much a bottle-fed baby needs to eat! What I found was a rule of thumb, baby's weight in pounds times 2.5 for number of ounces to drink, and this table, with average number of feedings and ounces per feeding.
age in months
total daily amount (oz)
number of daily feeds
amount of feeding (oz)
(Babies start solid food at 4 to 6 months, so they eat less liquid after 7 months.)