According to Kodak doc F-4043 for Tmax 400, page 4 says XTOL (1:1) at 75F is 7 minutes even. If you look back on page 3 under heading "Processing," it says for Condenser enlarger, "you may need to adjust the contrast by reducing your development time; see "Adjusting Film Contrast". This leads to page 8.
Here, compensation table is given but data for XTOL or XTOL (1:1) is missing. Under the heading "Contrast Adjustment", please see Note:... it says "These tables apply to.... diffusion... If you use condenser enlarger, shift... to left." Since a hard data is missing, I guessed 20%.
If you take 7 minutes and convert it to seconds, you get 420. Take 80% of it and get 336 seconds. Convert that back to minutes and seconds, you get 5 minutes and 36 seconds.