Meal frequency (1/2/3 vs 6) has virtually no impact on anything, due to the thermic effects of food intake. Entirely up to you and your lifestyle, I only eat 2 big (1500+ calorie) meals a day for instance, plus a PWO shake.
I highly suggest you track your food (and track it accurately). Do this for a couple weeks at minimum so you can learn just how much food you are getting. I guarantee it will be nowhere close to your estimates (assuming you've never tracked before).