Voke had four birdies and a bogey in the final round to record a fourth straight score in the 60s.
On the LPGA Tour, Lydia Ko had a poor final round to finish in a share of 11th place at the KEB Hana Bank Championship in Korea.
Starting the final day two shots back in fourth place, the Kiwi's hopes of a second win of the year all but ended in the opening five holes where she recorded two bogeys. Ko added a third bogey at the 12th before recording her only birdie of the day three holes later to card a two-over 74.
Ko finished eight-under for the tournament, eight shots behind Korean In Gee Chun who captured her third career win.
In, who started the final round two strokes off the pace, carded seven birdies against a lone bogey at the Sky 72 Ocean Course to finish at 16-under 272, three strokes ahead of Charley Hull who shot a 71.
No. 1-ranked Sung Hyun Park offset a pair of bogeys with five birdies for a 69 that left her tied for third with Ariya Jutanugarn (71), Minjee Lee (70) and overnight co-leader Danielle Kang (72).Defending champion Jin Young Ko had eight birdies in a bogey-free round for the day's lowest score of 64 to finish seventh.
Brooke Henderson struggled with the windy conditions and had a 71 that left her tied for 14th place.
