The mean sustained wind velocity, [tex]$v$[/tex], can be determined by the equation [tex]$v = 6.3 \sqrt{1013 - p}$[/tex], where [tex][tex]$p$[/tex][/tex] is the air pressure, in millibars, at the center of the hurricane. What is the approximate air pressure at the center of a hurricane when the mean sustained wind velocity is 64 meters per second?
A. 103 millibars
B. 194 millibars
C. 363 millibars
D. 910 millibars