The average person has between 1/4 lb to 1 lb of poop in their intestines.
Women for some reason tend to have less poop in their intestines than men do so men usually have at least 1 lb of poop in their intestines while a woman may only have 1/2 to 1/4 lb of poop in their intestines.
Most people are constantly producing poop in their intestines even though you may not need to have a bowel movement everyday.
If you're eating fiber based foods then you likely do have some amount of poop in your intestines and will eventually poop it out after a few days.
The more fiber you eat the more you're gonna poop and some people may need to poop twice per day while others may only need to poop once per day or once per week.