EXCLUSIVE

A former Tampa Bay Bucs cheerleader is demanding $661k from the NFL squad -- claiming that's how much cash she and her fellow pom-pommers were underpaid by the team over the last 5 years.

TMZ Sports has obtained a letter that lawyers for Manouchcar Pierre-Val sent to the Bucs org. after she sued the team for allegedly paying the ladies far less than what Florida law dictates for minimum wage.

In her suit, Pierre-Val argued the girls were only paid $100 per game ... and zero for practice time and other team events ... which added up to less than $2-per-hour.

Now, Pierre-Val's team is demanding the team fork over a check for at least $661k that all of the girls who have been on the squad over the last 5 years can split.

Pierre-Val's number is based on the fact the team has roughly 34 women on the squad per season ... which means each lady would be owed close to $4k per year they cheered for the Bucs.