TRUE VIPPER HERE!
It is pronounced as follows:
VEEP-PER.
The Japanese pronounce it BEEP-PAH, because that is the closest sound they can make. Many English words that end in -ER are changed to -AH in Japanese pronounciation of English words.
Like viper, pronounced VAI-PER, they pronounce it BAI-PAH.
Anyways, VIPPER is prounounced *VEEP-PER*, VIP being prounounced VEEP, instead of V-I-P, or VIH.