Sirant brings up a strong point. The body doesn't base hunger off calories alone, but nutrition level. You could have all your daily calories from alcohol or table sugar but you probably wouldn't last too long.
Even from the brief description of your diet, I can tell it's horrible and totally counter productive to controlling hunger and weight loss. You absolutely need more fiber and protein. Whole grain products, nuts, lean meats, vegetables and fruits. Once you switch off the refined carbs, your blood sugar levels should normalize and your hunger should decrease. A nice salad with lettuce, spinach, cucumbers, some orange slices and carrots with a vinaigrette is far better than a lean cuisine pizza. If you hate vegetables now, you'll develop a taste for them (I still cant stomach mushrooms though).
It doesn't make a huge difference how many times a day you eat, eat as often as you feel comfortable eating to help you control your hunger. If you eat 6 times a day, however, each meal will contain less calories than if you ate 3 meals a day but either way should equal up to your weight loss calorie level.