Some simple math can help us here. When looking to optimize anabolism and satiety, the number meals you eat throughout the day should be a divisor of the total amount of calories you eat.
If you eat 3,000 calories per day, then breaking that into 6 500 calorie meals would probably give you sufficient food to feel satisfied, while not demanding so much that you need to turn to lower quality foods in order to hit your per-meal calorie targets. On the other hand, if you eat only 2,000 calories per day, eating five 400-calories meals is not a satiating option, but eating four 500-calorie meals would be more filling.
Each of these meals should contain a minimum of 30 grams of protein (the amount which research has shown is necessary to maximally stimulate protein synthesis). This pulse of protein can also be effectively spaced out and repeated throughout the day for the biggest increases in protein synthesis. If your calories are so low that you can't get 30 grams of protein at each meal, sprinkle on a little leucine or have a BCAA drink with your meal to cover your bases in the protein synthesis department.
Remember when planning these meals that size is directly connected to satiety, so don't make them too small to be filling. Not a big-time planner? You can still do this. Just eat a solid, protein-rich meal every 3-4 hours, and you'll be more or less on track.