I’ve always pronounced it at “hung,” and hunge was sometimes used as slang for hunger in the 18th century.
Edit: Confirmed from Raven Rocks, a North Carolina heirloom apple grower. They state,
“Hunge (the name comes from the word “hunger”) originated among North Carolina Moravians in the 1700s, & was widely grown during the 19th century. The variety was thought extinct until a single tree was found in North Carolina about 25 years ago and propagated. The apple can be used for cooking, as well as fresh-eating (flavor improves as fruit ripens in storage & becomes highly aromatic). The mottled fruit usually is covered by a russet net, although the extent of the russetting can vary greatly from apple to apple. This rough texture, a natural feature of the skin, is common among heritage varieties.”