Radeon 6750M? Either that's a mobile GPU or somethings off. Either way Windows is recommended for Dolphin. Try switching to dedicated GPU and see if you get the same results. The only slowdown in Zelda TP is Hyrule Field later parts being that all i5 are hopeless in this area of the game.
[color=#666666]MSI [/color][color=#ff9933]CX[/color][color=#666666]60[/color]
[color=#999999]i5-4200M @ 3.5Ghz [/color][color=#ff9933]turboboost[/color]
[color=#666666]N[/color][color=#999999]vidia GT720[/color][color=#ff9933]M[/color]
[color=#999999][color=#666666]1[/color] [/color][color=#ff9966]TB[/color] [color=#999999]HDD[/color]
[color=#666666]Windows[/color] [color=#ff9933]8.1[/color]
[color=#999999][color=#666666]Wii [/color]Pro Controller [/color][color=#ff9933]+[/color] [color=#999999]Mayflash adapter, Wii Mote [/color][color=#ff9933]x2[/color]
[color=#999999]i5-4200M @ 3.5Ghz [/color][color=#ff9933]turboboost[/color]
[color=#666666]N[/color][color=#999999]vidia GT720[/color][color=#ff9933]M[/color]
[color=#999999][color=#666666]1[/color] [/color][color=#ff9966]TB[/color] [color=#999999]HDD[/color]
[color=#666666]Windows[/color] [color=#ff9933]8.1[/color]
[color=#999999][color=#666666]Wii [/color]Pro Controller [/color][color=#ff9933]+[/color] [color=#999999]Mayflash adapter, Wii Mote [/color][color=#ff9933]x2[/color]